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Ico is the name of the protagonist in the Japanese action-adventure game 'Ico', developed by Team Ico (named after the game) and Sony Computer Entertainment. Ico is a young boy who was born with horns, which his village considers a bad omen. Warriors lock him away in an abandoned fortress and during his explorations of the fortress, Ico encounters Yorda, the daughter of the castle's Queen. The Queen plans to use Yorda's body to extend her own lifespan. Learning this, Ico seeks to escape the castle with Yorda, keeping her safe from the shadow-like creatures that attempt to draw her back.

The name Ico was created by the developers as a play on the Japanese ikou (行こう) meaning "let's go", referencing the fact that Ico is leading Yorda through the castle in their escape.